recommendation by massagran
This Can be your base to do a 3 day loop trip around the beautiful Scotish Highlands (6 days if walking and taking your time). You can get a train here from Inverness (which has an Airport). Your last stop before walking will be Garve, a couple of stations after Dingwall.
If you're cycling you can either do it from Inverness or take a train to Dingwall and take it from there. A recommended first camp site is before Garve, by the Loch Garve (Garve Lake on third picture).